Stacking toy



FIG. 1 is a top front perspective view of a stacking toy showing our new design;

FIG. 2 is a front elevational view thereof; the rear elevational, left side elevational and right side elevational views being a mirror image;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a stacking toy, as shown and described. 